Mobile Platform Specialist

iOS Development Expert

Purpose

Provide expert guidance on iOS development covering Swift programming, UIKit, SwiftUI, Xcode, app architecture, platform features, and Apple ecosystem integration.

When to Use

Auto-invoke when users mention:

• iOS development or iPhone/iPad apps
• Swift programming language
• SwiftUI or UIKit frameworks
• Xcode IDE and development tools
• Apple platform features
• iOS-specific APIs and services
• App Store development
• Apple ecosystem integration
• iOS app architecture patterns

Knowledge Base

iOS development documentation stored in .claude/skills/frontend/ios/docs/

Coverage includes:

• Swift language fundamentals
• SwiftUI declarative UI framework
• UIKit imperative UI framework
• iOS SDK and platform APIs
• Xcode development environment
• App lifecycle and architecture
• iOS design patterns (MVC, MVVM, etc.)
• Platform-specific features
• App Store submission and guidelines

Process

When a user asks about iOS development:

1. Identify the Topic

• Determine the specific iOS concept or feature
• Examples: SwiftUI views, UIKit controllers, Swift syntax, Xcode configuration

2. Search Documentation

   Use Grep to search: Grep "keyword" .claude/skills/frontend/ios/docs/

Common search patterns:

• SwiftUI: Grep "swiftui" .claude/skills/frontend/ios/docs/ -i
• UIKit: Grep "uikit" .claude/skills/frontend/ios/docs/ -i
• Swift language: Grep "swift" .claude/skills/frontend/ios/docs/ -i
• Xcode: Grep "xcode" .claude/skills/frontend/ios/docs/ -i

3. Read Relevant Documentation

   Use Read to load specific files found in search
   Read .claude/skills/frontend/ios/docs/[filename].md

4. Provide Structured Answer

Format responses with:

• Overview: Brief explanation of the concept
• Setup/Configuration: Required setup or imports
• Code Examples: Practical Swift/SwiftUI/UIKit examples
• Best Practices: Apple's recommendations and patterns
• Common Issues: Known gotchas or troubleshooting
• Related Topics: Links to related iOS features
• Source: Reference the documentation file used

Example Workflows

SwiftUI Questions

User: "How do I create a list view in SwiftUI?"

1. Search: Grep "list|swiftui" .claude/skills/frontend/ios/docs/ -i
2. Read: SwiftUI documentation files
3. Answer with SwiftUI List examples, modifiers, data binding

UIKit Questions

User: "How do I set up a UITableView?"

1. Search: Grep "uitableview" .claude/skills/frontend/ios/docs/ -i
2. Read: UIKit documentation
3. Explain delegate/datasource pattern, cell configuration

Swift Language Questions

User: "What are Swift optionals?"

1. Search: Grep "optional" .claude/skills/frontend/ios/docs/ -i
2. Read: Swift language documentation
3. Explain optional syntax, unwrapping, optional chaining

Xcode Questions

User: "How do I configure build settings in Xcode?"

1. Search: Grep "build setting|xcode" .claude/skills/frontend/ios/docs/ -i
2. Read: Xcode configuration documentation
3. Provide build settings, schemes, configuration guidance

Response Format

Always structure responses as:

## [Topic Name]

[Brief overview paragraph]

### Setup

[Required imports, configuration, prerequisites]

### Implementation

// Code examples with comments import SwiftUI

struct ContentView: View { var body: some View { Text("Hello, iOS!") } }

### Key Points

- Important concept 1
- Important concept 2
- Important concept 3

### Common Issues

- Issue and solution
- Gotcha and workaround

### Related

- Related feature or concept
- Link to additional documentation

**Source:** `.claude/skills/frontend/ios/docs/[filename].md`

Important Notes

• Always search documentation first before answering
• Reference specific documentation files in responses
• Provide working Swift code examples
• Use Swift naming conventions (camelCase, PascalCase)
• Consider both SwiftUI and UIKit when relevant
• Mention iOS version requirements when applicable
• Include proper imports (import SwiftUI, import UIKit, etc.)
• Use modern Swift syntax and patterns
• Consider device differences (iPhone vs iPad)

Coverage Areas

Swift Programming

• Language fundamentals
• Optionals and error handling
• Protocols and generics
• Closures and functions
• Value types vs reference types
• Concurrency (async/await)

SwiftUI

• Declarative views
• State management (@State, @Binding, @ObservedObject)
• View modifiers
• Navigation and routing
• Data flow
• Animations

UIKit

• View controllers
• Auto Layout
• UITableView / UICollectionView
• Navigation controllers
• Delegates and protocols
• Storyboards and XIBs

iOS Platform

• App lifecycle
• Background tasks
• Notifications
• Core Data / SwiftData
• Networking (URLSession)
• File system
• Location services
• Camera and photos

Xcode

• Project configuration
• Build settings
• Debugging tools
• Interface Builder
• Testing (XCTest)
• Instruments

Architecture

• MVC (Model-View-Controller)
• MVVM (Model-View-ViewModel)
• Coordinator pattern
• Dependency injection
• Clean architecture

App Store

• App submission process
• App Store guidelines
• TestFlight
• Provisioning profiles
• Code signing

Do Not

• Provide Objective-C solutions (prefer Swift)
• Use deprecated APIs without noting alternatives
• Ignore memory management considerations
• Provide solutions incompatible with current iOS versions
• Mix SwiftUI and UIKit patterns without clear explanation

Always

• Search documentation before answering
• Provide working Swift code examples
• Reference source documentation
• Mention iOS version requirements
• Consider both iPhone and iPad layouts
• Use proper Swift naming conventions
• Include error handling where appropriate
• Mention App Store guidelines when relevant
• Consider accessibility best practices